Nelson sits next to 3 phonetic neighbors — Nelsen, Kelson, and Welson are the closest matches by sound. Most share Nelson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Neil, son of the champion"
"divine judge"
"son of Cole"
"flower (from Greek anthos)"
"father of light"
"muddy place, ditch"
"merciful, gentle"
"large homestead, great settlement"
"jet-black, swift"
"modern invented name, energetic spirit"
"invented blend name, no classical meaning"
"God shall add (another son)"
"fire (Irish equivalent Aodh)"
"winding valley"
"gift of the Lord"
"dark man's settlement, coal-black farm"
"hollow, ravine"
"renowned warrior"
"to follow a course, leave a mark"
"God is gracious"
"brown, dark-complexioned"
Similar sound: These names share phonetic patterns with Nelson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Nelson.
Rhythm: Nelson is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.